利用因式分解计算123×0.45+12.3×6.7-212×1.
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/05 23:45:34
利用因式分解计算123×0.45+12.3×6.7-212×1.
![利用因式分解计算123×0.45+12.3×6.7-212×1.](/uploads/image/z/5495916-12-6.jpg?t=%E5%88%A9%E7%94%A8%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E8%AE%A1%E7%AE%97123%C3%970.45%2B12.3%C3%976.7-212%C3%971.)
123×0.45+12.3×6.7-212×1.23
=1.23×45+1.23×67-212×1.23
=1.23×(45+67-212)
=1.23×(-100)
=-123
=1.23×45+1.23×67-212×1.23
=1.23×(45+67-212)
=1.23×(-100)
=-123